National Dental Examining Board of Canada (NDEB) Practice Exam 2025 - Free NDEB Practice Questions and Study Guide

Question: 1 / 400

What does the IAN block needle penetrate aside from the oral mucosa?

Masseter muscle

Buccinator muscle lateral to the pterygomandibular raphe

The IAN (Inferior Alveolar Nerve) block needle penetrates through the oral mucosa to reach the inferior alveolar nerve. The masseter muscle (A), temporalis muscle (C), and medial pterygoid muscle (D) are all deep facial muscles that would not be reached by the IAN block needle. The buccinator muscle (B), on the other hand, is a superficial muscle located on the lateral side of the pterygomandibular raphe, making it the only possible option for the IAN block needle to penetrate through.

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Temporalis muscle

Medial pterygoid muscle

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